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प्रश्न
When a wave is propagating from a rarer to a denser medium, which characteristic of the wave does not change and why?
टीपा लिहा
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उत्तर
Frequency of a wave does not change when the wave is propagating from a rarer to a denser medium because frequency (ν) is given by the relation
`"v" = "v"/lambda`
As the medium changes velocity (v) and wavelength (λ) change such that ratio remains constant.
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